Which of the following pairs are cold-blooded animals?

Animals can be classified as cold-blooded (ectothermic) or warm-blooded (endothermic) based on how they regulate their body temperature. Cold-blooded animals do not maintain a constant internal body temperature; instead, their temperature fluctuates with the surrounding environment. They rely on external sources of heat, such as sunlight or warm surfaces, to regulate their body functions.

The correct answer, frog and snakes, represents typical cold-blooded animals. Frogs are amphibians, and their body temperature changes with water and air temperature. They are highly dependent on environmental heat to stay active, move, and digest food. Similarly, snakes, which are reptiles, also depend on external heat to regulate their metabolism, movement, and overall activity. Both frogs and snakes adjust their behavior according to environmental conditions, such as basking in the sun to increase body temperature or seeking shade to cool down.

Other options are incorrect because they include warm-blooded animals. Birds, bats, rats, and monkeys maintain a stable internal body temperature regardless of the surrounding environment. This allows them to survive in various climates and remain active even when external temperatures fluctuate.

Cold-blooded animals generally have slower metabolic rates than warm-blooded animals, and their growth, digestion, and reproduction are heavily influenced by temperature. Studying ectothermic animals helps students understand adaptation, thermoregulation, and ecological roles in different habitats.

Understanding which animals are cold-blooded is a fundamental concept in zoology and biology, especially in topics related to animal physiology, adaptation, and environmental interaction. Frogs and snakes are classic examples that illustrate the characteristics and behavior of ectothermic species in nature.